Keir Starmer Faces Unprecedented Backlash After Labour’s Devastating Caerphilly By-Election Loss
Labour’s fort of Caerphilly, held for a century, has fallen into fermentation. The party suffered a humiliating defeat on Friday night, throwing Keir Starmer’s leadership into the limelight.
Plaid Cymru seized the seat decisively, leaving Labour trailing in a shocking third place. Reform UK surged past Labour, despite their leader, Nigel Farage, vowing to “throw everything” at victory.
Political analysts warn the loss could signal broader troubles for Labour in Wales and Scotland ahead of next May’s local elections.
Professor John Curtice, a leading polling expert, said: “The party is in severe trouble in Wales… Plaid Cymru are well placed to provide the country’s next leader… [but] this result does not suggest that Mr Farage’s bubble is burst.”
The by-election results were striking: Plaid’s Lindsay Whittle secured 47% of the vote. Reform’s Llyr Powell captured 36%. Labour’s Richard Tunnicliffe barely managed 11%, a staggering drop of 35 percentage points from 2021.
The Conservatives fared even worse, with just 2% of the vote, marking their worst by-election performance ever. Voter turnout exceeded 50%, with a nearly 27% swing away from Labour.
The contest followed the death of the previous MP, Hefin David, prompting urgent reflection within the party. Caerphilly MP Chris Evans warned: “Lessons must be learned.”
Meanwhile, Mainstream, a faction linked to Sir Keir’s possible rival Andy Burnham, criticised the leadership, calling the party “detached from its moral purpose.”
Baroness Morgan of Ely, Labour’s First Minister in Wales, described the result as occurring “in the midst of difficult headwinds nationally.” Senior sources said that Starmer now finds himself “in a dangerous position.”
In a statement, Keir Starmer expressed his disappointment: “I am deeply disappointed… we clearly need to do much more.”
The outgrowth has raised alarm bells about Labour’s grip on its traditional fortresses. Political observers suggest the party faces a binary challenge: maintaining its core sympathisers while fending off rivals on both the left and right.
As the party recalibrates, attention now turns to whether Starmer can restore confidence before coming time’s critical original choices or if this marks the morning of a prolonged struggle for Labour in Wales.



